Skip to main content

Html Agility Pack HTML Parsing Engine


Attention to get the latest Official Html Agility Pack releases please use the Nuget Package

Html Agility Pack is an HTML parsing engine written for .NET. It is available for many .NET platforms including .NET CF, WP7 and Silverlight


What is exactly the Html Agility Pack (HAP)?

This is an agile HTML parser that builds a read/write DOM and supports plain XPATH or XSLT (you actually don't HAVE to understand XPATH nor XSLT to use it, don't worry...). It is a .NET code library that allows you to parse "out of the web" HTML files. The parser is very tolerant with "real world" malformed HTML. The object model is very similar to what proposes System.Xml, but for HTML documents (or streams).

Html Agility Pack now supports Linq to Objects (via a LINQ to Xml Like interface). Check out the new beta to play with this feature

Sample applications:

Page fixing or generation. You can fix a page the way you want, modify the DOM, add nodes, copy nodes, well... you name it.
Web scanners. You can easily get to img/src or a/hrefs with a bunch XPATH queries.
Web scrapers. You can easily scrap any existing web page into an RSS feed for example, with just an XSLT file serving as the binding. An example of this is provided.

There is no dependency on anything else than .Net's XPATH implementation. There is no dependency on Internet Explorer's MSHTML dll or W3C's HTML tidy or ActiveX / COM object, or anything like that. There is also no adherence to XHTML or XML, although you can actually produce XML using the tool. The version posted here on CodePlex is for the .NET Framework 2.0. If you need the old version, please go to the old page or drop me a note.

Examples
http://htmlagilitypack.codeplex.com/wikipage?title=Examples

Download
http://htmlagilitypack.codeplex.com/

For More Info

http://runtingsproper.blogspot.in/2009/11/easily-extracting-links-from-snippet-of.html
http://runtingsproper.blogspot.in/2009/09/introduction-to-htmlagilitypack-library.html


Sample Code

HtmlDocument doc = new HtmlDocument();
doc.Load(@"C:\Sample.HTM");
HtmlNodeCollection linkNodes = doc.DocumentNode.SelectNodes("//a/@href");

Content match = null;

// Run only if there are links in the document.
if (linkNodes != null)
{
    foreach (HtmlNode linkNode in linkNodes)
    {
        HtmlAttribute attrib = linkNode.Attributes["href"];
        // Do whatever else you need here
    }
}
Labels:

Comments

Post a Comment

Popular posts from this blog

How to hide url parameters in asp.net

There are different ways to Hide the URL in asp.net , you can choose any one from bellow options . Previously I was Explained about the  Difference between Convert.tostring and .tostring() method Example  ,   Reasons to use Twitter Bootstrap , How to Register AJAX toolkit in web.config file in asp.net a) Using Post Method b) Using Of Session . c) URL Encoding & decoding process . d) Using Server.Transfer() instead of Response.Redirect() method (1)Use a form and POST the information. This might require additional code in source pages, but should not require logic changes in the target pages (merely change Request.QueryString to Request.Form). While POST is not impossible to muck with, it's certainly less appealing than playing with QueryString parameters. (2)Use session variables to carry information from page to page. This is likely a more substantial effort compared to (1), because you will need to take session variable checking into account...
Post a Comment
Read more

How to send mail asynchronously in asp.net with MailMessage

With Microsoft.NET Framework 2.0 everything is asynchronous and we can send mail also asynchronously. This features is very useful when you send lots of bulk mails like offers , Discounts , Greetings . You don’t have to wait for response from mail server and you can do other task . By using     SmtpClient . SendAsync Method (MailMessage, Object)    you need to do  System.Net.Mail has also added asynchronous support for sending email. To send asynchronously, you need need to Wire up a SendCompleted event Create the SendCompleted event Call SmtpClient.SendAsync smtpClient.send() will initiate the sending on the main/ui  thread and would block.  smtpClient.SendAsync() will pick a thread from the .NET Thread Pool and execute the method on that thread. So your main UI will not hang or block . Let's create a simple example to send mail. For sending mail asynchronously you need to create a event handler that will notify that mail success...
Post a Comment
Read more

12 Sentences that Change Your Attitude at Work

If you work with the right attitude and right way, you’ll have your productivity up another level, and eventually, success will be just a step away. These are the 12 encouraging sentences that could change your attitude at work. #1 Don’t work harder, work deeper. #2 When you are young, work to learn, not to earn. #3 If you work really hard and are kind, amazing things will happen. #4 Productivity is never an accident. It is always the result of commitment to excellence, intelligent planning, and focused effort. #5 Most people work just hard enough not to get fired and get paid just enough money not to quit. #6 Boost your productivity by taking action immediately after setting a target even without perfect plans. Adjust your course along the way. #7 To be successful, the first thing to do is to fall in love with your work. #8 Identify your peak hour of productivity. Schedule your most important task for this period. Work on unimportant tasks during non-peak hours. #9 Be a mo...
Post a Comment
Read more